Self-feeding warm-air furnace.



S. P. MONCRIEP.

SELF FEEDING WARM AIR IUBJNACE.

APPLIUATION FILED JULY 12, 1910.

1,022,965, Patented Apr. 9, 1912.

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:OLUMIIA PLANOURAPH CD.. WASHINGTON, Dfc.

S. P. MOIICRIItTr".v

SELF IEEDINGI WARM AIB. FURNAGE.

APPLIUATION FILED JULY 12, 1910.

1 ,022,965, I Patented Apr. 9, 1912.

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STEPHEN P. MONCRIEF, or ATLANTA, GEORGIA.

SELF-FEEDING- WARM-AIR FURNACE'.

Specification of Letters Patent.

Patented Apr. 9, 1912.

Application filed July 12, 1910'. Serial No. 571,643.

To all 'whom it may concern: p

Be it known that I, STEPHEN I. MON- CHIEF, a citizen of the United States,residing at Atlanta, in the county of Fulton and; State of Georgia, have invented a new and useful Self-Feeding VVarm-Air Furnace, of which the following is a specification.

The invention relates tol a self feeding.

warm air furnace.

The object of the present invention is to improve the construction of warm air furnaces, and to provide a self heating warm air furnace, equipped with a simple, inexpensive and eflicientmagazine, designed to effect a saving in both labor and fuel, and

having a capacity to run the furnace for av period of from fifteen to twenty hours without attention, so that furnaces of this character may be run continuously day and night and will require attention not more thany twice in twenty-four hours With these and other objects in view, the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanyingdrawings, and pointed out in the claim hereto appended; it being understood that various changes in the form, proportion, size and minor details of construction, within the scope of the claim may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings z-Figure 1 is a central vertical sectional view of a warm air furnace, constructed in accordance with this invention. Fig. 2 is a horizontal sectional view on the line 2-2 of Fig. 1. Fig. 3 is a horizontal sectional view on the line 3-3 of Fig. 1.

Like numerals of reference designate corresponding parts in all th-e figures of the drawings. I

In the embodiment of the invention illustrated in the accompanying drawings, the warm air furnace comprises in its construction an inner shell 1 or furnace proper, constructed of cast iron, or other suitable material, and made up of sections fitted together, as shown, cup joints 2 and cement being preferably employed to form gas tight connections. The bottom. section 3 constitutes the ash pit and is mounted on a suitable base 4. The lire pot 5 is com posed of two sections and is surmounted by an intermediate dome-shaped section (i,

which constitutes the combustion chamber and supports a main dome sectionl 7. The base also supports an outer shell or casing 8, constructed of suitable sheet metal and composed of separate sections, jointed together by means of a casing ring 9. The furnace is equipped at the front with an ash door 10, having a suitable draft controlling damper 11. A suitable grate 12 is arranged at the bottom of the fire pot and the intermediate dome-shaped section 6 is provided with a feed chute 13, extending to the outer shell or casing and normally closed by a feed door 14. These features of the furnace are of the usual construction and may be varied as desired.

Surrounding the main dome 7 of the inner casing or furnace proper is an annular radiator 15, preferably consisting of a sheet metal body and cast iron top and bottom sections or rings 16 and 17. The parts or sections of the radiator are securedtogether by meansy of vertical bolts 16a, extending through perforations of the lugs or flanges formed integral with the upper and lower ,sections or rings 16-and 17 of the radiator.

The radiator is connected at the front with Ythe interior of the inner shell or casing by a short tube or pipe 18, andthe smoke and other products of combustion pass out from the furnace at the front thereof and enter the radiator and pass around the same to a rear pipe connection 19, extending from the radiator tothe smoke pipe 20. By this arrangement the radiator is highly heated by the products of combustion, which are caused to travel around the furnace instead of escaping` directly to the smoke pipe. cleanout tube 21, whichk isjl provided with a clean-out door 22, extendskfrom the outer shell or casing to the front of the radiator and communicates with the interior thereof to enable the radiator to bey cleaned. The radiator is supported by braces 23 and by the pipe connection 18, which is preferably cast integral with the main dome 7 of the inner casing. clined, may be of any desired number and are arranged at intervals in the space between the main dome 7 and the radiator. The upper ends ofthe braces are bolted, or otherwise secured to the radiator, and their lower ends are similarly fastened to the main dome section 7. l

The outer shell or casing is provided with a top section or hood 24 of the usual construction, inclosing a hot air chamber and The' braces, which are indesigned to be connected by suitable pipes 25 with the various rooms or apartments to be heated. In order to avoid affecting the heating efficiency of the radiator or interfering with the arrangement of the pipe 25, the top section or hood 2% and the main dome section 7 are provided with central openings for the reception of a depending magazine 26, preferably constructed of castV metal and tapered from the top to the bottom. The magazine, which extends downward into the furnace to approximately the plane of the bottom of the feed chute 13, also projects above the outer shell or casing and is equipped with a suitable top or cover 27, hinged at the back at 2S and provided at the front with a suitable handle 29 to enable it to be readily opened and closed to expose the upper end or feed mouth of the magazine. The top or cover is provided with a peripheral flange 30, extending downwardly and outwardly at an inclination Aand fitting in an annual recess 31, formed by an exteriorly projecting annular flange 32 of the magazine. The flange 32 constitutes a seat for the top or cover 27 and with the flange 30 of the latter provides a gas tight joint or connection.

The magazine is Connected with the outer shell or casing by means of an annular ring 33, constructed of cast iron, or other suitable material, and having a tapered interior to fit the magazine and presenting an inclined lower face to conform to the config-- uration of the inclined top wall 34 of the outer shell or casing. The ring is bolted, or otherwise secured to both the magazine and to the outer shell or casing. The main dome section 7 of the inner casing 1 is provided with an annular groove 35, surrounding the opening in the top of the section 7 and receiving a depending annular flange 36 of the magazine. The flange 36 of the magazine is formed integral therewith and is seated in the groove and embedded in cement to form a gas tight joint or connection.

, The magazine is supported by bars or braces 37, arranged at an. inclination and secured to lugs 38 and 39 of the magazine and the main dome section 7. The lugs 3S, which are formed integral with the magazine, extend outward horizontally therefrom, and the lugs 39, which are cast integral with the dome section 7, present horizontal lupper faces to the braces and are arranged substantially in the same plane as the top of the radiator. Any desired number of braces and lugs may be employed to suit the character of the magazine to be supported.

As the braces are located in the space between the inner and outer shells, they will not be subjected to sufficient heat to cause them to expand and contract, and they will support the downwardly tapered magazine in a permanent position. lVhile the magazine does not move, the joint between the magazine and the top of the main dome of the inner shell will move through expansion and contraction. This movement is taken care of by the joint formed by the annular flange 36 and the groove 35, and as this joint is filled with cement, it has an expansion and contraction equal to the metal of which t-he furnace is constructed, and it makes a secure and gas tight oint and there is no liability of causing cracking of the cast-ings or sections through such expansion and contraction.

The lire can be started as in any ordinary furnace through the feed door, and this should be done and the fuel fed to the fire until the latter reaches the level of the bottom of the feed chute. The magazine can then be filled with hard coal and even when the weather is extremely cold and it is desired to run the furnace continuously, it will not be necessary to fill up the magazine more than twice a day. In milder' weather where less heat is required, the fuel contained in the magazine will be sufficient to feed the fire for twenty four hours without attention.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is

A furnace of the class described including an inner casing having a dome provided at the top with an opening and having a groove in its upper edge surrounding the said opening, an outer shell spaced from the inner shell and provided at the top with an opening located above the opening of the inner shell, a downwardly tapered magazine extending through the openings of the inner and outer shells and snugly fitting the same and provided above the dome with an annular fiange extending downwardly into the groove of the dome, braces located in the space between the inner and outer shells and connected with the exterior of the inner shell and with the magazine and supporting the latter in a permanent position, and a filling of cement arranged in the groove of the dome and having the flange of the magazine embedded in it to form a gas tight joint or connection, said flange permitting an expansion and contraction of the dome without affecting the said gas tight joint or connection.

In testimony, that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

STEPHEN I). MONCRIEF.

Witnesses:

I-I. A. HALL,

MABEL BUCHANAN.

Copies 'of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

